Position div behind overlapping div - html

Question

I've got the following setup http://jsfiddle.net/47x60k4w/529/.
HTML
<div class="header">
header
</div>
<div class="inner_block">
<div class="column">
<img src="xxx" />
</div>
<div class="column">
<img src="xxx" />
</div>
<div class="column">
<img src="xxx" />
</div>
</div>
<div class="footer">
footer
</div>
The inner_block should overlap the header class and the footer should be placed right behind the inner_block.
In my solution I just don't get the footer behind the inner_block without doing not responsible stuff like calling a margin-top with x.xem on it. I just found some links with z-index stuff which didn't worked for me because the inner_block lost his passed height and width from the nested block.
The result should look like this beautiful mockup.
Do you have any ideas?
Thanks in advance.

Answer 1

So I made the following changes to your code:
Remove the position: absolute for the inner-block.
As you are floating the contents of the inner-block you have clear the floats so that the parent container will not lose height.
.inner_block:after {
content: '';
display: block;
clear: both;
}
Whenever using floats, remember to clear it.
Added position: relative to the inner_block to position it over the header and footer.
Added display: block to the img so that you can remove the small space below it characteristic on inline elements (the default display).
Also tinkered a bit with the margins and widths to achieve the layout.
.header {
position: relative;
background-color: black;
width: 100%;
height: 50px;
}
.footer {
clear: both;
background-color: red;
width: 100%;
height: 50px;
}
.inner_block {
position: relative;
/*width: 100%;*/
border: solid 1px black;
padding: 5px;
margin-left: 2.5%;
margin-top: -2.5%;
margin-right: 2.5%;
margin-bottom: 2.5%;
background-color: white;
}
.inner_block:after {
content: '';
display: block;
clear: both;
}
.column {
max-width: 30%;
float: left;
margin-right: 2.5%;
}
.column:first-child{
margin-left: 2.5%;
}
.column:last-child{
margin-left: 0;
}
.column img {
max-width: 100%;
height: auto;
display: block;
}
<div class="header">
</div>
<div class="inner_block">
<div class="column">
<img src="http://www.healthytravellovers.com/wp-content/uploads/2016/09/photo233227749810088605.jpg" />
</div>
<div class="column">
<img src="http://www.healthytravellovers.com/wp-content/uploads/2016/09/photo233227749810088607.jpg" />
</div>
<div class="column">
<img src="http://www.healthytravellovers.com/wp-content/uploads/2016/09/photo233227749810088606.jpg" />
</div>
</div>
<div class="footer">
test
</div>
Hope this gives you a head-start. Check it out and let me know your feedback on this. Thanks!
Alternate Solution:
So here is a solution using a flexbox which is easier to set up:
First remove the floating container and the clearfix.
Now Wrap the inner_block with another div
.inner_block_wrapper {
margin: -2.5% 2.5% 2.5% 2.5%;
background-color: white;
position: relative;
}
.inner_block {
border: solid 1px black;
background-color: white;
padding: 5px;
display: flex;
justify-content: center;
}
.column {
margin: 5px;
}
Using display: flex allows the images to take the available space along the row and justify-content: center aligns it along the center. Check this out!
.header {
position: relative;
background-color: black;
width: 100%;
height: 50px;
}
.footer {
clear: both;
background-color: red;
width: 100%;
height: 50px;
}
.inner_block_wrapper {
margin: -2.5% 2.5% 2.5% 2.5%;
background-color: white;
position: relative;
}
.inner_block {
border: solid 1px black;
background-color: white;
padding: 5px;
display: flex;
justify-content: center;
}
.column {
margin: 5px;
}
.column img {
max-width: 100%;
height: auto;
display: block;
}
<div class="header">
</div>
<div class="inner_block_wrapper">
<div class=" inner_block ">
<div class="column ">
<img src="http://www.healthytravellovers.com/wp-content/uploads/2016/09/photo233227749810088605.jpg " />
</div>
<div class="column ">
<img src="http://www.healthytravellovers.com/wp-content/uploads/2016/09/photo233227749810088607.jpg " />
</div>
<div class="column ">
<img src="http://www.healthytravellovers.com/wp-content/uploads/2016/09/photo233227749810088606.jpg " />
</div>
</div>
</div>
<div class="footer ">
test
</div>

Answer 2

You can even try something as below, your codes were fine just set your .footer margin-top equal to the height of .header and .inner_block using css calc() function.
.header{
position:relative;
background-color:black;
width:100%;
height:50px;
}
.footer{
background-color:red;
width:100%;
height:50px;
margin-top:calc(100% - 82%);
}
.inner_block{
position: absolute;
width:90%;
border:solid 1px black;
padding: 5px;
background-color:white;
margin:-2.5% calc(100% - 97%);
}
.column {
width:30%;
float:left;
margin:0 1.6%;
}
.column img {
max-width:100%;
height:auto;
}
<div class="header">
</div>
<div class="inner_block">
<div class="column">
<img src="http://www.healthytravellovers.com/wp-content/uploads/2016/09/photo233227749810088605.jpg" />
</div>
<div class="column">
<img src="http://www.healthytravellovers.com/wp-content/uploads/2016/09/photo233227749810088607.jpg" />
</div>
<div class="column">
<img src="http://www.healthytravellovers.com/wp-content/uploads/2016/09/photo233227749810088606.jpg" />
</div>
</div>
<div class="footer">
test
</div>

Answer 3

is this what you were looking for ?
.header{
position:relative;
background-color:black;
width:100%;
height:50px;
}
.footer{
clear:both;
background-color:red;
width:100%;
height:50px;
}
.inner_block{
position: absolute;
width:100%;
border:solid 1px black;
padding: 5px;
margin-left: 2.5%;
margin-top:-2.5%;
background-color:white;
}
http://jsfiddle.net/8y4e8L08/

Answer 4

.header {
height: 200px;
width:800px;
background-color:#000;
margin:20px;
}
.header {
margin-bottom: -25px;
}
.inner_block {
width: 35%;
height: 150px;
margin: auto 200px;
background-color:#FFF;
border:1px solid #000;
margin-top: -45px;
}
.column{
max-width:20%;
float:left;
border: 2px soid #999;
margin:25px;
}
.column img{
max-width:100%;
height:auto;
}
.footer {
height: 100px;
margin-top: -25px;
margin:20px;
background-color:#F00;
width:800px;
}
.content {
position: relative;
z-index: 1;
}
<div class="header"></div>
<div class="inner_block">
<div class="column">
<img src="download.jpg"/>
</div>
<div class="column">
<img src="download.jpg"/>
</div>
<div class="column">
<img src="download.jpg"/>
</div>
</div>
<div class="footer">
</div>

Answer 5

Well just using the z-index won't always work. You also need to specify the 'position' property as well so as to define the z-index wrt some position of the frame.
Z-index is a property which defines the 'depth' or 'height' of an element. If your <header> has z-index of '100' and; <div> element defined inside the header, usually it would be shown above it but once you define the z-index:50; since 50<100, <div> element would be hidden behind it.
Example of z-index
1) http://www.w3schools.com/cssref/tryit.asp?filename=trycss_zindex
2) https://css-tricks.com/almanac/properties/z/z-index/
Hope it helps.